Re: [Vserver] [Re:] vcontext/login CPU usage at 100%

Hi,

I also have this problem. Is there already a solution?

My setup:

# vserver-info
Versions:
                   Kernel: 2.6.20.11-vs2.2.0
                   VS-API: 0x00020200
             util-vserver: 0.30.212; Dec 9 2006, 12:26:51

Features:
                       CC: gcc, gcc (GCC) 4.1.2 20061115 (prerelease)
(Debian 4.1.1-20)
                      CXX: g++, g++ (GCC) 4.1.2 20061115 (prerelease)
(Debian 4.1.1-20)
                 CPPFLAGS: ''
                   CFLAGS: '-Wall -g -O2 -std=c99 -Wall -pedantic -W
-funit-at-a-time'
                 CXXFLAGS: '-g -O2 -ansi -Wall -pedantic -W
-fmessage-length=0 -funit-at-a-time'
               build/host: i486-pc-linux-gnu/i486-pc-linux-gnu
             Use dietlibc: yes
       Build C++ programs: yes
       Build C99 programs: yes
           Available APIs: compat,v11,fscompat,v13,net,v21,oldproc,olduts
            ext2fs Source: e2fsprogs
    syscall(2) invocation: alternative
      vserver(2) syscall#: 273/glibc

Paths:
                   prefix: /usr
        sysconf-Directory: /etc
            cfg-Directory: /etc/vservers
         initrd-Directory: $(sysconfdir)/init.d
       pkgstate-Directory: /var/run/vservers
          vserver-Rootdir: /var/lib/vservers

Assumed 'SYSINFO' as no other option given; try '--help' for more
information.

# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 3
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 4
cpu MHz : 2992.742
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
constant_tsc pni monitor ds_cpl cid xtpr
bogomips : 5989.51
clflush size : 64

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 3
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 4
cpu MHz : 2992.742
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
constant_tsc pni monitor ds_cpl cid xtpr
bogomips : 5985.45
clflush size : 64

Thanks,
Rúben

Em Sab, Março 24, 2007 18:26, Luis escreveu:
> Summary:
> ===================================
> After a "vserver XX enter", if vcontext/login gets disconnected from its
> terminal its CPU usage steadily increases to 100%.
> ===================================
>
> Description:
> ===================================
> We are having exactly the same problem this guy had:
> http://archives.linux-vserver.org/200701/0054.html
>
> Here is his description of the problem and how he managed to reproduce it:
>
>> First problem:
>> In some situations my CPU was burning like hell for days before I
>> noticed it.
>> This was the vcontext/login process, the one running when using the
>> command "vserver XX enter".
>> If it happens that the process is disconnected from its terminal it
>> eats all the CPU :-(
>>
>> Apparently it happens when the session is not ended properly
>> (disconnections, etc)
>> I could reproduce the problem as follow:
>> * ssh to the server as normal user
>> * sudo su -
>> * vserver XX enter
>> * now from another term, kill -9 on either of the two su processes
>> ("su -" or "-su")
>> At that point the session in the vserver ends but vcontext is still
>> hooked to the current terminal so cpu is fine.
>> * now quit the current terminal
>> At that point vcontext is not hooked to any terminal (vps ax => "?"
>> on the tty column) and using top you see it's running 100% cpu, ~ 80%
>> system and 20% user.
>
> We can reproduce this problem following exactly the same steps. After
> quitting the terminal, CPU usage steadily increases to 100%.
>
> Let us know if there's any other information that might be useful. Also,
> if you can't reproduce the problem on your side, maybe we can help
> debugging it from here. Anyway, let us know.
> ===================================
>
> Environment:
> ===================================
>
> Kernel
> ==============
> $ cat /proc/version
> Linux version 2.6.20.1-vs2.2.0-rc15 (root@satanbuild) (gcc version
> 3.4.6) #1 SMP Fri Mar 2 20:28:38 BRT 2007
> ==============
>
> CPU
> ==============
> $ cat /proc/cpuinfo
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 15
> model : 43
> model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
> stepping : 1
> cpu MHz : 2010.339
> cache size : 512 KB
> physical id : 0
> siblings : 2
> core id : 0
> cpu cores : 2
> fpu : yes
> fpu_exception : yes
> cpuid level : 1
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
> fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
> bogomips : 4023.12
> TLB size : 1024 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management: ts fid vid ttp
>
> processor : 1
> vendor_id : AuthenticAMD
> cpu family : 15
> model : 43
> model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
> stepping : 1
> cpu MHz : 2010.339
> cache size : 512 KB
> physical id : 0
> siblings : 2
> core id : 1
> cpu cores : 2
> fpu : yes
> fpu_exception : yes
> cpuid level : 1
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
> fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
> bogomips : 4020.87
> TLB size : 1024 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management: ts fid vid ttp
> ==============
>
> Modules
> ==============
> Monolithic kernel, no modules support.
> ==============
>
> ===================================
>
> testme.sh output:
> ===================================
> Linux-VServer Test [V0.17] Copyright (C) 2003-2006 H.Poetzl
> chcontext is working.
> chbind is working.
> Linux 2.6.20.1-vs2.2.0-rc15 #1 SMP Fri Mar 2 20:28:38 BRT 2007 x86_64
> Ea 0.30.212 236/glibc (S*) <v13,net,v21>
> VCI: 0002:0200 236 03000417 (TbLgnsP)
> ---
> [000]# succeeded.
> [001]# succeeded.
> [011]# succeeded.
> [031]# succeeded.
> [101]# succeeded.
> [102]# succeeded.
> [201]# succeeded.
> [202]# succeeded.
> ===================================
>
> testfs.sh output:
> ===================================
>
> Legacy mode
> ==============
> Linux-VServer FS Test [V0.15] Copyright (C) 2005-2006 H.Poetzl
> Linux 2.6.20.1-vs2.2.0-rc15 x86_64/0.30.212
> VCI: 0002:0200 236 03000417 (ID24)
> ---
> testing ext2 filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]* [104]* [106]. [108]. [109]*
> [112]. [113]* [114]* [115]. [116]* [117]. [118]. [119]*
> [121]* [122]* [123]* [124]* [128]. [129].
>
>
> ---
> testing ext3 filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]* [104]* [106]. [108]. [109]*
> [112]. [113]* [114]* [115]. [116]* [117]. [118]. [119]*
> [121]* [122]* [123]* [124]* [128]. [129].
>
>
> ---
> testing xfs filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]* [104]* [106]. [108]. [109]*
> [112]. [113]* [114]* [115]. [116]* [117]. [118]. [119]*
> [121]* [122]* [123]* [124]* [128]. [129].
>
>
> ---
> testing reiser filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]* [104]* [106]. [108]. [109]*
> [112]. [113]* [114]* [115]. [116]* [117]. [118]. [119]*
> [121]* [122]* [123]* [124]* [128]. [129].
>
>
> ---
> testing jfs filesystem ...
> [000]. xattr related tests ...
> [101]*
> ==============
>
> New-style config
> ==============
> Linux-VServer FS Test [V0.15] Copyright (C) 2005-2006 H.Poetzl
> Linux 2.6.20.1-vs2.2.0-rc15 x86_64/0.30.212
> VCI: 0002:0200 236 03000417 (ID24)
> ---
> testing ext2 filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]. [104]. [106]. [108]. [109].
> [112]. [113]. [114]. [115]. [116]* [117]* [118]. [119].
> [121]. [122]. [123]. [124]. [128]. [129].
>
>
> ---
> testing ext3 filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]. [104]. [106]. [108]. [109].
> [112]. [113]. [114]. [115]. [116]* [117]* [118]. [119].
> [121]. [122]. [123]. [124]. [128]. [129].
>
>
> ---
> testing xfs filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]. [104]. [106]. [108]. [109].
> [112]. [113]. [114]. [115]. [116]* [117]* [118]. [119].
> [121]. [122]. [123]. [124]. [128]. [129].
>
>
> ---
> testing reiser filesystem ...
> [000]. xattr related tests ...
> [101]. [102]. [103]. [104]. [106]. [108]. [109].
> [112]. [113]. [114]. [115]. [116]* [117]* [118]. [119].
> [121]. [122]. [123]. [124]. [128]. [129].
>
>
> ---
> testing jfs filesystem ...
> [000]. xattr related tests ...
> [101]*
> ==============
>
> ===================================
>
> --
> Luis
>
> OpenPGP key:
> 0xA53D8214 | keyserver.noreply.org
>
>
> _______________________________________________
> Vserver mailing list
> Vserver@list.linux-vserver.org
> http://list.linux-vserver.org/mailman/listinfo/vserver
>

-- 
Rúben Leote Mendes -- ruben@nocturno.org
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